EP3193787B1 - Doublure de prothèse acétabulaire - Google Patents

Doublure de prothèse acétabulaire Download PDF

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Publication number
EP3193787B1
EP3193787B1 EP15742473.0A EP15742473A EP3193787B1 EP 3193787 B1 EP3193787 B1 EP 3193787B1 EP 15742473 A EP15742473 A EP 15742473A EP 3193787 B1 EP3193787 B1 EP 3193787B1
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EP
European Patent Office
Prior art keywords
liner
thickness
stiffening member
acetabular prosthesis
acetabular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15742473.0A
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German (de)
English (en)
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EP3193787A1 (fr
Inventor
Aaron P. Smith
Kirk J. Bailey
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Biomet Manufacturing LLC
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Biomet Manufacturing LLC
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Publication date
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Publication of EP3193787A1 publication Critical patent/EP3193787A1/fr
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Publication of EP3193787B1 publication Critical patent/EP3193787B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4609—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30324—The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2002/3208—Bipolar or multipolar joints, e.g. having a femoral head articulating within an intermediate acetabular shell whilst said shell articulates within the natural acetabular socket or within an artificial outer shell
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
    • A61F2002/3414—Polar protrusion, e.g. for centering two concentric shells
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3429—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3445—Acetabular cups having a number of shells different from two
    • A61F2002/3448—Multiple cups made of three or more concentric shells fitted or nested into one another
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/345—Acetabular cups the inner and outer (hemi)spherical surfaces of a shell, e.g. an intermediate shell, having distinct centres of rotation, both located on the centre line of the shell

Definitions

  • the present disclosure relates to an acetabular shell liner, and particularly to a reinforcing structure for a shell liner.
  • Articulating regions of the anatomy can include areas where two bone sections move relative to one another.
  • an acetabulum can provide a region for articulation with a femoral head.
  • the articulating region can become injured, worn, or suffer from a condition such as arthritis, but it can be replaced with various prostheses.
  • Such prostheses can replace the acetabulum, the femoral head, and various other portions of the femur, or other combinations thereof.
  • the replacement of both the acetabulum and the femoral head is generally referred to as a total joint replacement.
  • the replacement is generally referred to as a total hip replacement.
  • the invention concerns an acetabular prosthesis liner as defined in claim 1 and a method of manufacturing an acetabular prosthesis liner as defined in claim 8.
  • An acetabular prosthesis liner for a hip replacement assembly includes a thin shell liner forming a portion of a sphere and configured to engage an acetabular cup.
  • the thin shell liner includes an outer surface, an inner surface configured to directly engage a primary femoral head an apical portion, an open portion having an open portion thickness measured between the inner surface and the outer surface, wherein a diameter of the inner surface is between 70 % and 99 % of a diameter of the outer surface a centering member on the outer surface a stiffening member extending away from the outer surface of the thin shell liner for an extension distance, the stiffening member formed continuous with the outer surface and the inner surface, the stiffening member being configured to minimise distortion of the thin shell liner wherein the stiffening member has a thickness, and wherein a maximum thickness of the stiffening member is less than the extension distance.
  • a hip replacement assembly may include an acetabular cup, a large femoral head, a small femoral head.
  • the large femoral head may articulate within the acetabular cup, and the small femoral head is configured to articulatingly fit within the large femoral head.
  • a shell liner forming a portion of a sphere may engage the acetabular cup.
  • the shell liner includes an acetabular cup engaging surface, a large femoral head engaging surface, and a stiffening member integrated with the acetabular cup engaging surface and the large femoral head engaging surface.
  • the stiffening member is further configured to minimize distortion of the shell liner from the portion of the sphere shape when force is applied to the liner.
  • the large femoral head articulatingly engages the shell liner.
  • a method of manufacturing a thin shell acetabular liner includes forming an outer surface into at least a part of a sphere and forming an inner surface into at least part of a sphere. Forming a flange such that the outer surface includes a first side of the flange, the inner surface includes a second side of the flange opposing the first side of the flange, the flange having a flange thickness defined by the distance between the outer surface and the inner surface, the flange extending a distance away from the outer surface; wherein forming the inner surface and forming the outer surface forms a liner wherein a diameter of the inner surface is between 70 % and 99 % of a diameter of the outer surface wherein the flange thickness is nearly equal to the liner thickness and the flange thickness is smaller than the distance that the flange extends from the outer surface. Furthermore, forming a centering member on the outer surface at a near central position of the outer surface.
  • a hip replacement assembly 10 includes an acetabular cup 12, a large femoral ball 14, a small femoral ball 16, and a shell liner 18.
  • the acetabular prosthesis liner 18 may have a curved inner and outer surface, and further may form a portion of a sphere.
  • the hip replacement assembly 10, for example, may replace a patient's femoral head and acetabulum.
  • the shell liner 18, as shown in Figs. 2-4 may have a curved outer surface 20 and curved inner surface 22.
  • the outer surface 20 and inner surface 22 may form a portion of a sphere, or sphere-like shape.
  • the outer surface 20 may engage the acetabular cup 12.
  • the shell liner 18 may also include conical sections or cylindrical sections.
  • the outer surface 20 may also be an acetabular cup engaging surface and the inner surface 22 may also be a large femoral ball engaging surface.
  • the outer surface 20 may be substantially convex and the inner surface 22 may be substantially concave.
  • the shell liner 18 may also have an apical portion 18a and an open portion 18b.
  • the shell liner 18 further includes a stiffening member or portion 24 that is near the open portion 18b and a centering member 26 that is near the apical portion 18a.
  • the shell liner 18 may also be thin and have a thickness 25 measured between the inner surface 22 and the outer surface 20.
  • the thickness 25 may be uniform from the apical portion 18a and the open portion 18b.
  • the thickness 25 may be about 2 millimeters (mm) to about 10 mm and further including about 5 mm.
  • the thickness of the liner 18 is generally defined by the thickness 25 of the source material from which the liner 18 is formed.
  • the thickness 25, however, may also vary between an apical portion thickness 25a, measured near the apical portion 18a, and an open portion thickness 25b, measured near the open portion 18b.
  • the apical portion thickness 25a and the open portion thickness 25b may be unequal.
  • the apical thickness may be about 5 mm to about 15 mm and the open portion thickness may be about 2 mm to about 5 mm.
  • the thickness may vary gradually, or the wall of the liner 18 may be stepped.
  • the shell liner 18 is a thin member.
  • the inner surface 22 of the shell liner 18 may have an inner diameter 22a and the outer surface may have an outer diameter 20a.
  • the shell liner 18 may be thin when the inner diameter 22a has a dimension that is close to the outer diameter 20a.
  • the inner diameter 22a may be about 70% to about 99% of the outer diameter 20a, further including about 85% to about 90 %, and further including about 91% to about 97 %.
  • the thickness of the liner near the rim may be about 0.5 millimeter (mm) to about 1.5 (mm), including about 1 mm to about 1.5 mm, and further including about 1 mm. The thickness may be the dimension between the inner diameter 22a and the outer diameter 20a.
  • the shell liner 18 may be thin when the inner surface 22 is such that the large femoral head 14 may have a volume that is maximized for the shell liner 18.
  • the large femoral head 14 with maximum volume may increase a range of motion, reduces the risk of dislocation, and/or minimize point loading on the head 14 compared to the large femoral head 14 at a smaller volume.
  • the stiffening member 24 is configured to minimize and/or eliminate distortion of the shell liner 18.
  • the stiffening member 24 minimizes distortion of the shape or configuration of the liner 18 from the portion of the sphere shape when force, such as a compressive body force, is applied to the shell liner 18.
  • force I may be applied to the shell liner 18 by an insertion tool 27 when the hip replacement assembly 10 is placed in the patient, as shown in Fig. 3 (patient not shown).
  • force B may be applied to the outer surface 20 of the liner 18 by a body weight of the patient, for example, when the patient is standing. Therefore, the liner 18 also experiences reaction force F on the inner surface 22 of the liner because of the body weight of the patient.
  • the stiffening member 24 minimizes and /or eliminates distortion of the shell liner 18, despite being thin, when a force is applied to the shell liner.
  • the stiffening member 24 may extend away from the outer surface 20 of shell liner 18.
  • the stiffening member 24 may be formed as one piece that is integral with the outer surface 20 and the inner surface 22. Therefore, the stiffening member 24 may be a lip or flange.
  • the stiffening member may be formed by machining or bending a solid portion of the liner 18.
  • the stiffening member 24 may also be formed separately from the outer surface 20 and the inner surface 22 and attached to the liner 18.
  • the stiffening member may be attached using commonly known joining methods, such as welding or brazing.
  • the stiffening member 24 may, therefore, have surfaces that are continuous with the outer surface 20 and the inner surface 22.
  • the stiffening member 24 may further have a thickness 24a that is smaller than an extension distance 24b of the stiffening member 24.
  • the stiffening member 24 may have the thickness 24a that is about 1 mm in dimension and have the extension 24b that is about 6 mm in dimension.
  • the stiffening member 24 may, however, have the thickness 24a of about 1 mm to about 10 mm.
  • the extension distance 24b of the stiffening member 24 may have a dimension of about 5 mm to about 50 mm.
  • the stiffening member 24 may also have the thickness 24a similar to the liner thickness 25 or the open portion thickness 25b' (shown in phantom).
  • the liner 18 may have the open portion thickness 25b' near the stiffening member 24 that is similar to the stiffening member thickness 24a.
  • the open portion thickness 25b may be substantially larger than stiffening member thickness 24a. It is understood, however, that the stiffening member 24 may have any appropriate thickness 24a that is generally larger in dimension than the extension 24b.
  • the hip replacement assembly 10 may include a large femoral head 14 and a small femoral head 16.
  • the large femoral head 14 may be known as a primary head and the small femoral head 16 may be known as a secondary head, which may engage with a femoral stem 17.
  • the small femoral head 16 is configured to be partially fit within the large femoral head 14 and to articulatingly engage the large femoral head 14.
  • the small femoral head 16 may articulate or rotate within the large femoral head 14 in at least one direction according to the movement of the hip H.
  • the large femoral head 14 is configured to articulatingly engage the shell liner 18.
  • the large femoral head 14 may articulate or rotate within the shell liner 18 in at least one direction. Therefore, both the large femoral head 14 and the small femoral ball 16 may articulate or rotate in at least one direction to provide the hip replacement assembly 10 with a range of motion and to reduce the risk of dislocation.
  • the hip replacement assembly 10 may also include a centering member 26 on the outer surface 20 of the shell liner 18.
  • the centering member 26 may be near the apical portion 18a of the shell liner 18.
  • the centering member 26 may be a protrusion that is configured to engage the acetabular cup 12 and center the shell liner 18 within the acetabular cup 12.
  • the centering member 26 may be on the outer surface 20 of the shell liner 18 and configured to engage and center the shell liner 18 within an acetabular cup 12.
  • the centering member 26 may fit within a depression 28 of the acetabular cup 12 such that movement and position of the shell liner 18 relative to the acetabular cup 12 is restricted.
  • the shell liner 18 may be manufactured or formed by forming the outer surface 20 and the inner surface 22, such as by machining the shell liner 18 from a solid member.
  • forming may also be other methods, such as casting, forging, welding, or 3D printing. Such methods may include investment casting of the liner 18.
  • the inner surface 22 and outer surface 20 are each formed into a partial sphere. Forming the inner surface 22 and forming the outer surface 20 also forms the liner thickness 25 of the liner 18.
  • the liner thickness 25 may be formed to be much less than its diameter.
  • the liner thickness 25 may be formed to the dimensions as described above.
  • the centering member 26 may be formed as a protrusion that is formed to engage the acetabular cup 12 and center the shell liner 18 within the acetabular cup 12.
  • the centering member 26 may be formed on the outer surface 20 of the shell liner 18 and formed to frictionally engage and center the shell liner 18 within an acetabular cup 12.
  • the centering member 26 may be formed to fit within a depression 28 of the acetabular cup 12 such that movement and position of the shell liner 18 relative to the acetabular cup 12 is restricted.
  • the stiffening member 24 is formed to extend away from the outer surface 20 to minimize distortion of the shell liner 18.
  • the stiffening member 24 is formed to minimize distortion from the formed shape, such as the portion of the sphere or sphere-like shape, when pressure is applied to the shell liner 18.
  • the stiffening member 24 may be formed with a thickness that is nearly equal to the liner thickness.
  • the lip may be formed to have dimensions as described above.
  • the flange, or stiffening member 24 may further be formed to have a thickness that is much smaller than a width of the flange.
  • the stiffening member 24 may be formed to have the dimensions as described above.
  • Forming the stiffening member 24 includes forming the outer surface 20 to include a side of the stiffening member 24 and forming the inner surface 22 to include an opposing side of the stiffening member 24.
  • a cylinder of appropriate material may be machined to form the stiffening member 24 to extend away from the outer surface 20.
  • the liner 18 may be formed and the stiffening member 24 may be machined separately as an annular member and affixed to the liner 18 near the open end 18b.
  • the shell liner 18 may provide for a shell acetabular prosthesis liner 18 that maximizes femoral head size for increased hip H joint stability.
  • the shell liner 18 includes the stiffening member 24 that is configured to minimize distortion. Therefore, the acetabular shell liner 18 according to the present teachings increases range of motion and reduces the risk of dislocation of the hip replacement assembly 10.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Claims (15)

  1. Insert de prothèse acétabulaire (18) pour un ensemble de remplacement de hanche comprenant :
    un insert de coque fine possédant une forme profilée configurée pour mettre en prise une cupule acétabulaire (12), l'insert de coque fine incluant :
    une surface externe (20) ;
    une surface interne (22) configurée pour venir directement en prise avec une tête fémorale primaire (14) ;
    une partie apicale (18a) ;
    une partie ouverte (18b) possédant une épaisseur de partie ouverte (25b) mesurée entre la surface interne et la surface externe, dans lequel un diamètre de la surface interne est entre 70 % et 99 % d'un diamètre de la surface externe ; un élément de centrage (26) sur la surface externe ; et
    un élément de rigidification (24) s'écartant de la surface externe de l'insert de coque fine sur une distance d'écartement (24b), l'élément de rigidification formé en continu avec la surface externe et la surface interne, l'élément de rigidification étant configuré pour minimiser une distorsion de l'insert de coque fine ;
    dans lequel l'élément de rigidification possède une épaisseur (24a), et dans lequel une épaisseur maximum de l'élément de rigidification est inférieure à la distance d'écartement.
  2. Insert de prothèse acétabulaire
    selon la revendication 1, dans lequel la distance d'écartement est entre 5 mm et 50 mm et l'épaisseur de l'élément de rigidification est entre 1 mm et 10 mm.
  3. Insert de prothèse acétabulaire
    selon la revendication 1 ou 2, dans lequel un ratio de l'épaisseur maximum de l'élément de rigidification par rapport à l'épaisseur de la partie ouverte est environ une unité.
  4. Insert de prothèse acétabulaire
    selon l'une quelconque des revendications 1 à 3, dans lequel l'élément de centrage est configuré pour mettre en prise la cupule acétabulaire et centrer l'insert de coque fine à l'intérieur de la cupule acétabulaire.
  5. Insert de prothèse acétabulaire selon la revendication 4, comprenant en outre : la cupule acétabulaire ;
    dans lequel l'élément de centrage inclut une protubérance (26) configurée pour mettre en prise une caractéristique de la cupule acétabulaire.
  6. Insert de prothèse acétabulaire selon l'une quelconque des revendications 1 à 5, comprenant en outre : la tête fémorale primaire ;
    dans lequel la tête fémorale primaire met en prise de manière articulée la surface interne de l'insert de coque fine.
  7. Insert de prothèse acétabulaire
    selon la revendication 6, dans lequel une tête secondaire met en prise de manière articulée la tête fémorale primaire ; la tête secondaire venant en outre en prise avec une tige fémorale.
  8. Procédé de fabrication d'un insert de prothèse acétabulaire pour un ensemble de remplacement de hanche, le procédé comprenant :
    la formation d'une surface externe de l'insert de prothèse acétabulaire ; la formation d'une surface interne de l'insert de prothèse acétabulaire comme une sphère partielle ; et
    la formation d'une bride de manière à ce que la surface externe inclue un premier côté de la bride, la surface interne inclue un deuxième côté de la bride opposé au premier côté de la bride, la bride ayant une épaisseur de bride définie par la distance entre la surface externe et la surface interne, la bride s'écartant d'une distance depuis la surface externe ;
    et la formation d'un élément de centrage sur la surface externe ;
    dans lequel la formation de la surface interne et la formation de la surface externe forment un insert dans lequel un diamètre de la surface interne est entre 70 % et 99 % d'un diamètre de la surface externe ;
    dans lequel l'épaisseur de la bride est sensiblement égale à l'épaisseur de l'insert et l'épaisseur de la bride est inférieure à la distance sur laquelle la bride s'écarte de la surface externe.
  9. Procédé selon la revendication 8, dans lequel la formation inclut au moins l'un parmi la coulée, l'usinage, le forgeage, la soudure ou l'impression 3D.
  10. Insert de prothèse acétabulaire selon la revendication 1, dans lequel l'épaisseur maximum de l'élément de rigidification est 1 mm.
  11. Insert de prothèse acétabulaire selon la revendication 1, dans lequel l'élément de rigidification est configuré pour minimiser une distorsion de l'insert de coque depuis la forme profilée quand une force est appliquée à l'insert de coque.
  12. Insert de prothèse acétabulaire selon la revendication 11, comprenant en outre : la tête fémorale primaire ;
    dans lequel la tête fémorale primaire est configurée pour appliquer la force à l'insert de coque.
  13. Insert de prothèse acétabulaire selon l'une quelconque des revendications 1 à 7, dans lequel l'épaisseur de la partie ouverte (25b) est entre 2 mm et 5 mm.
  14. Insert de prothèse acétabulaire selon l'une quelconque des revendications 1 à 7, dans lequel l'épaisseur de la partie ouverte (25b) est entre 0,5 mm et 1,5 mm.
  15. Procédé selon la revendication 8, dans lequel une épaisseur mesurée entre la surface interne et la surface externe est entre 0,5 mm et 1,5 mm.
EP15742473.0A 2014-07-15 2015-07-13 Doublure de prothèse acétabulaire Active EP3193787B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/331,842 US20160015520A1 (en) 2014-07-15 2014-07-15 Acetabular prosthesis liner
PCT/US2015/040140 WO2016010895A1 (fr) 2014-07-15 2015-07-13 Doublure de prothèse acétabulaire

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Publication Number Publication Date
EP3193787A1 EP3193787A1 (fr) 2017-07-26
EP3193787B1 true EP3193787B1 (fr) 2018-10-24

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US10322002B2 (en) * 2016-06-28 2019-06-18 Mwi Veterinary Supply Co. Veterinary hip resurfacing prosthetic system
US10905436B2 (en) 2017-03-02 2021-02-02 Optimotion Implants, Llc Knee arthroplasty systems and methods
US11406502B2 (en) 2017-03-02 2022-08-09 Optimotion Implants LLC Orthopedic implants and methods
CN107638233A (zh) * 2017-10-27 2018-01-30 北京大学国际医院 一种3d打印股骨头的防脱位髋关节假体及其制造方法
WO2021050214A1 (fr) * 2019-09-11 2021-03-18 Cedars-Sinai Medical Center Appareil et procédé pour former un espaceur de hanche articulé sur ciment sur mesure

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CH673087A5 (fr) * 1987-10-28 1990-02-15 Sulzer Ag
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US4936855A (en) * 1989-04-24 1990-06-26 Intermedics, Orthopedics, Inc. Stepped-lock ring system for implantable joint prostheses
DE69322169T2 (de) * 1993-06-29 1999-06-24 Ao Forschungsinst Geschmierte pfanne für gesamtgelenkprothese
US5549700A (en) * 1993-09-07 1996-08-27 Ortho Development Corporation Segmented prosthetic articulation
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FR2793137B1 (fr) * 1999-05-07 2001-08-31 Tornier Sa Implant cotyloidien et son dispositif d'adaptation
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US20160015520A1 (en) 2016-01-21
EP3193787A1 (fr) 2017-07-26
WO2016010895A1 (fr) 2016-01-21

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